Alan Turing Codebreaker's Puzzle Book
by Gareth Moore Author
An excellent collection of puzzles that allows you to test your codebreaking skills. If you can solve every puzzle in the book you might once have been recruited to join the ranks of Alan Turing's codebreakers! It contains a wide range of different types of puzzles. Published and approved by the organization run by early computer genius Alan Turing's family.
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